[Digikam-users] Re: NEF/RAW+JPG: how to maintain coherent metadata

[Robert Zeller]

Julien,

please find my comments in your text:

On 01/21/2011 02:51 PM, Julien T wrote:
> Thanks Robert, Elle,
>
> In fact, I also have all nef+jpg in the same folder.
>
> good script Robert.
> two question
> - is there a way to ensure there is no nef tagged by errors and no
> erasing of user-metadata ?
>   
The script works for all *.nef that have a common basename with a *.exv
; e.g. if there is one dscxxx.exv and a dscxxx.nef then the metadata
that were selected by the parameters that follow the -i option will be
replaced in the raw file with those in the .exv file. If you don't want
to replace the data of a particular dscyyy.nef then you have to remove
the related dscyyy.exv before executing the script.
> - why exiv2 -iix*e* ? e is for photo exif metadata. you don't want to
> keep the raw ones ?
>   
It depends upon what you want to replace; if you want to leave the
original exif section untouched, then of course leave the "e" parameter
out. If you want to replace everything you can use the "a" parameter :
exiv2 -ia *.nef will replace all sections with the respective contents
in the *.exv files. I am not quite sure about the comment/caption. Until
recently it was not possible to write a comment to nefs. But I had the
impression that with the newest exiv library this is also possible now
with Nikon raw files.
> Elle, if you can publish your process exiftool, I'm sure that I will
> not the only one interested.
>
> Thanks a lot
>
> 2011/1/20, Elle Stone <l.elle.stone at gmail.com>:
>   
>> Hi Julien,
>>
>> I'm doing something similar to what Robert is doing. Except I've
>> decided to keep the raw files in the same directory as the jpegs. I
>> don't shoot jpegs along with my raw (cr2) files. Rather I use exiftool
>> to extract the preview image and save as a "sidecar" jpeg for each raw
>> file.
>>
>> I use exiftool to write all the metadata from the raw file over to the
>> extracted sidecar jpeg. In digikam, I only write metadata to the
>> sidecar jpeg. And after using digikam to tag, write captions, etc for
>> the sidecar jpegs, I use exiftool to write the tags and captions back
>> over to the raw files.
>>
>> Exiftool syntax is a bit complicated sometimes. I'm writing up my
>> procedure. When I'm finished (hopefully today), if you like I'll post
>> it for you to consult.
>>
>> I can't compare exiv2 to exiftool, having never used exiv2.
>> Undoubtedly either will serve your purposes.
>>
>> Elle
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>>     
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